Subject: Re: #1, DAD, DHCP clients and servers... (Fwd)

From: "Michael W. Carney" <[email-masked]>
Date: Fri, 17 Mar 2000 14:04:02 -0800 (PST)

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Date: Fri, 17 Mar 2000 11:39:54 -0800 (PST)
From: "Tim Hartrick" <[email-masked]>
Subject: Re: #1, DAD, DHCP clients and servers...
To: [email-masked]

Mike,

For what it is worth my two cents..
 
> Thus:
> 
> a) Do we want to enable DHCPv6 to return IP addresses independent of
> client interface ID?
>

Yes.
 
> b) If (a) is YES, then is it important for clients to notify servers of
> the address collision (or more generally, resource collision)?
>

Yes.  Note that one of the things that DAD does in addition to finding
IPv6 address collisions is detect link-layer address collisions.  While
this is a extremely rare occurence the protocol should be resilient enough
to handle the situation.
 
> c) If (b) is YES, then the mechanism I propose is similar to DHCPv4. We
> add a new message type, the Decline message, and a the client would
> include an IP address extension with the client IP address field set to
> the duplicate address, the 'C' bit set, and the status field would
> contain a TBD value informing the server that the IP address is already
> in use. Please feel free to propose other solutions.
>

I am not qualified to pass judgement but this sounds reasonable.

tim
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